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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-10473-1 <br /> Method Blank- Batch: 720-25442 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-25442/3 Analysis Batch: 720-25442 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200708\0£ <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 08/26/2007 1121 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/26/2007 1121 <br /> Analyte Result Qual RL <br /> Benzene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Toluene ND 0.50 <br /> Xylenes, Total ND 1.0 <br /> Gasoline Range Organics(GRO)-C5-C12 ND 50 <br /> Surrogate % Rec Acceptance Limits <br /> Toluene-d8(Surr) 103 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 88 73- 130 <br /> Lab Control Spike/ Method: 8260B <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-25442 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-25442/2 Analysis Batch: 720-25442 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200708\0� <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 08/26/2007 1000 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/26/2007 1000 <br /> LCSD Lab Sample ID:LCSD 720-25442/1 Analysis Batch: 720-25442 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200708\08', <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 08/26/2007 1027 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/26/2007 1027 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 105 100 69- 129 4 20 <br /> Toluene 104 103 70- 130 1 20 <br /> Surrogate LCS% Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 103 101 77- 121 <br /> 1,2-Dichloroethane-d4 (Surr) 108 98 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 31 of 50 09/10/2007 <br />